syzbot


WARNING in kunmap_local_indexed

Status: upstream: reported C repro on 2024/02/26 13:19
Subsystems: mm
[Documentation on labels]
Reported-by: syzbot+691cb37358791bebebe6@syzkaller.appspotmail.com
First crash: 484d, last: 19h47m
Discussions (8)
Title Replies (including bot) Last reply
[syzbot] Monthly mm report (Jun 2025) 0 (1) 2025/06/13 12:25
[syzbot] Monthly mm report (May 2025) 0 (1) 2025/05/12 13:34
[syzbot] Monthly mm report (Aug 2024) 0 (1) 2024/08/02 16:15
[syzbot] Monthly mm report (Jul 2024) 0 (1) 2024/07/01 10:28
[syzbot] Monthly mm report (May 2024) 0 (1) 2024/05/31 06:48
[syzbot] Monthly mm report (Apr 2024) 0 (1) 2024/04/29 12:35
[syzbot] Monthly mm report (Mar 2024) 0 (1) 2024/03/19 21:40
[syzbot] [mm?] WARNING in kunmap_local_indexed 0 (1) 2024/02/26 13:19
Last patch testing requests (8)
Created Duration User Patch Repo Result
2025/03/03 11:01 34m retest repro upstream error
2025/03/03 09:17 34m retest repro upstream error
2024/12/23 09:41 1h15m retest repro upstream error
2024/12/23 08:42 34m retest repro upstream error
2024/10/14 09:30 10m retest repro upstream report log
2024/10/14 08:32 9m retest repro upstream report log
2024/08/05 08:15 49m retest repro upstream report log
2024/08/05 08:15 16m retest repro upstream report log

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 3105 at mm/highmem.c:622 kunmap_local_indexed+0x210/0x228 mm/highmem.c:622
Modules linked in:
Kernel panic - not syncing: kernel: panic_on_warn set ...
CPU: 0 UID: 0 PID: 3105 Comm: syz-executor699 Not tainted 6.15.0-rc5-syzkaller #0 PREEMPT 
Hardware name: ARM-Versatile Express
Call trace: 
[<802019e4>] (dump_backtrace) from [<80201ae0>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:257)
 r7:00000000 r6:828227fc r5:00000000 r4:82257c34
[<80201ac8>] (show_stack) from [<80220020>] (__dump_stack lib/dump_stack.c:94 [inline])
[<80201ac8>] (show_stack) from [<80220020>] (dump_stack_lvl+0x54/0x7c lib/dump_stack.c:120)
[<8021ffcc>] (dump_stack_lvl) from [<80220060>] (dump_stack+0x18/0x1c lib/dump_stack.c:129)
 r5:00000000 r4:82a70d4c
[<80220048>] (dump_stack) from [<802025f8>] (panic+0x120/0x374 kernel/panic.c:354)
[<802024d8>] (panic) from [<802619e8>] (check_panic_on_warn kernel/panic.c:243 [inline])
[<802024d8>] (panic) from [<802619e8>] (get_taint+0x0/0x1c kernel/panic.c:238)
 r3:8280c604 r2:00000001 r1:8223e7fc r0:822462fc
 r7:804c6318
[<80261974>] (check_panic_on_warn) from [<80261b4c>] (__warn+0x80/0x188 kernel/panic.c:749)
[<80261acc>] (__warn) from [<80261dcc>] (warn_slowpath_fmt+0x178/0x1f4 kernel/panic.c:776)
 r8:00000009 r7:82271710 r6:df9add1c r5:84220c00 r4:00000000
[<80261c58>] (warn_slowpath_fmt) from [<804c6318>] (kunmap_local_indexed+0x210/0x228 mm/highmem.c:622)
 r10:00000000 r9:debcbe60 r8:deb6ca80 r7:00a00000 r6:00000003 r5:84220c00
 r4:ffefd000
[<804c6108>] (kunmap_local_indexed) from [<8053ffac>] (__kunmap_local include/linux/highmem-internal.h:94 [inline])
[<804c6108>] (kunmap_local_indexed) from [<8053ffac>] (move_pages_pte mm/userfaultfd.c:1420 [inline])
[<804c6108>] (kunmap_local_indexed) from [<8053ffac>] (move_pages+0xb60/0x18d4 mm/userfaultfd.c:1831)
 r7:00a00000 r6:00000000 r5:84952c94 r4:8460d200
[<8053f44c>] (move_pages) from [<805c1830>] (userfaultfd_move fs/userfaultfd.c:1898 [inline])
[<8053f44c>] (move_pages) from [<805c1830>] (userfaultfd_ioctl+0xf6c/0x20c0 fs/userfaultfd.c:2021)
 r10:8460d200 r9:df9ade98 r8:21000000 r7:00000001 r6:00000000 r5:20000040
 r4:84920000
[<805c08c4>] (userfaultfd_ioctl) from [<8056b530>] (vfs_ioctl fs/ioctl.c:51 [inline])
[<805c08c4>] (userfaultfd_ioctl) from [<8056b530>] (do_vfs_ioctl fs/ioctl.c:860 [inline])
[<805c08c4>] (userfaultfd_ioctl) from [<8056b530>] (__do_sys_ioctl fs/ioctl.c:904 [inline])
[<805c08c4>] (userfaultfd_ioctl) from [<8056b530>] (sys_ioctl+0x138/0xd84 fs/ioctl.c:892)
 r10:84220c00 r9:00000003 r8:84499480 r7:20000040 r6:84499480 r5:00000000
 r4:c028aa05
[<8056b3f8>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:67)
Exception stack(0xdf9adfa8 to 0xdf9adff0)
dfa0:                   ffffffff 00000000 00000003 c028aa05 20000040 00000000
dfc0: ffffffff 00000000 0008e050 00000036 20ffd000 00000000 20000000 0008a270
dfe0: 7ea54c70 7ea54c60 00010694 0002e7e0
 r10:00000036 r9:84220c00 r8:8020029c r7:00000036 r6:0008e050 r5:00000000
 r4:ffffffff
Rebooting in 86400 seconds..

Crashes (1857):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/05/08 00:42 upstream 707df3375124 dbf35fa1 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2024/06/05 08:20 upstream 32f88d65f01b e1e2c66e .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2024/02/26 07:15 upstream 70ff1fe626a1 8d446f15 .config console log report syz C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/19 21:47 upstream fb4d33ab452e ed3e87f7 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/19 09:30 upstream 74b4cc9b8780 ed3e87f7 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/18 10:35 upstream 4663747812d1 e77fae15 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/18 07:55 upstream 4663747812d1 e77fae15 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/17 19:08 upstream 9afe652958c3 a5686133 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/17 18:56 upstream 9afe652958c3 a5686133 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/17 10:32 upstream 9afe652958c3 cfebc887 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/16 19:08 upstream e04c78d86a96 d1716036 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/16 05:19 upstream 08215f5486ec 5f4b362d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/16 05:19 upstream 08215f5486ec 5f4b362d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/16 02:43 upstream 08215f5486ec 5f4b362d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/16 01:19 upstream 08215f5486ec 5f4b362d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/15 16:23 upstream 8c6bc74c7f89 5f4b362d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/15 12:02 upstream 8c6bc74c7f89 5f4b362d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/14 23:30 upstream 4774cfe3543a 5f4b362d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/14 22:18 upstream 4774cfe3543a 5f4b362d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/14 22:03 upstream 4774cfe3543a 5f4b362d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/14 10:51 upstream 18531f4d1c8c 0e8da31f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/13 08:24 upstream 27605c8c0f69 98683f8f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/12 17:33 upstream 2c4a1f3fe03e 98683f8f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/12 16:40 upstream 2c4a1f3fe03e 98683f8f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/12 15:38 upstream 2c4a1f3fe03e 98683f8f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/12 04:25 upstream 488ef3560196 98683f8f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/12 02:45 upstream 488ef3560196 98683f8f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/10 20:35 upstream f09079bd04a9 5d7e17ca .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/10 18:27 upstream f09079bd04a9 5d7e17ca .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/10 06:03 upstream 19272b37aa4f 4826c28e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/09 17:32 upstream 19272b37aa4f 4826c28e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/09 02:04 upstream 939f15e640f1 4826c28e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/09 01:51 upstream 939f15e640f1 4826c28e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/08 15:59 upstream 8630c59e9936 4826c28e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/08 00:09 upstream bdc7f8c5adad 4826c28e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/07 22:41 upstream bdc7f8c5adad 4826c28e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/07 09:09 upstream c0c9379f235d 4826c28e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/07 07:19 upstream c0c9379f235d 4826c28e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/07 05:29 upstream c0c9379f235d 4826c28e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/07 04:39 upstream c0c9379f235d 4826c28e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/06 15:15 upstream e271ed52b344 3d899f2c .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/06 13:44 upstream e271ed52b344 3d899f2c .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/05 21:26 upstream ec7714e49479 6b6b5f21 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/05 21:25 upstream ec7714e49479 6b6b5f21 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/05 09:35 upstream 16b70698aa3a 6b6b5f21 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/05 07:27 upstream 16b70698aa3a 6b6b5f21 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/05 02:41 upstream 16b70698aa3a 6b6b5f21 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/04 16:26 upstream 5abc7438f1e9 a30356b7 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2025/06/02 17:12 upstream cd2e103d57e5 aaaaf5ea .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
2024/02/22 13:12 upstream 39133352cbed 345111b5 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 WARNING in kunmap_local_indexed
* Struck through repros no longer work on HEAD.